Open AccessFormation mechanisms of small fragment ions in nanosecond laser induced fragmentation of C60
Author(s) -
钱东斌,
马新文,
张大成,
祖凯玲,
刘惠萍,
汶伟强
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.5810
Subject(s) - nanosecond , fluence , kinetic energy , ion , fragmentation (computing) , atomic physics , materials science , laser , excited state , breakup , range (aeronautics) , fullerene , optics , physics , computer science , mechanics , operating system , composite material , quantum mechanics
The time of flight mass spectrometric technique was used to determine the initial mean kinetic energy of small fragment ions C+n (n≤11) produced from C60 excited by 532nm nanosecond laser pulses. The measured kinetic energy shows little variation with the fragment mass and the laser fluence in a broad range. Based on the assumption that C+30 is produced predominantly by a single electron emission followed by successive C2 evaporation from hot C60 in the nanosecond laser fieldthe formation of small fragments is interpreted as the complete breakup of the unstable C+30 cage structure. The interpretation is consistent with the previously observed results.